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270

answers:

1
Q: 

Numpy image - rotate matrix 270 degrees...

I've got a Numpy 2d array that represents a grey-scale image and I need to rotate it 270 degrees. Might be being a bit thick here but the two ways I can find to do this seem quite... circulous:

rotated = numpy.rot90(numpy.rot90(numpy.rot90(orignumpyarray)))

rotated = numpy.fliplr(numpy.flipud(numpy.rot90(orignumpyarray)))

I'm thinking there must be a better way to do this in one operation. Basically a rot270() function? Any ideas?

+1  A: 

You can tell rot90 to rotate several times, this should work:

rotated = numpy.rot90(orignumpyarray,3)
Anders Lindahl  2010-03-17 10:13:24
Brilliant, that'll do the trick. Thanks.
Mikesname  2010-03-17 10:30:20

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